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Granulation apparatus, preparation method for preparing catalyst for silicon tetrachloride catalytic hydrogenation reaction, and silicon tetrachloride catalytic hydrogenation reaction method

A technology of catalytic hydrogenation reaction and granulation device, which is applied in the direction of metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, silicon halide compound, etc., and can solve the problem of loss of catalytic activity of silicon-copper alloy catalyst and other problems , to achieve the effect of uniform size, increased specific surface area and high yield

Active Publication Date: 2015-12-23
新疆硅基新材料创新中心有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Excessive cuprous chloride will reduce the silicon-copper alloy to metallic copper and deposit on the surface of the active point, resulting in the loss of the catalytic activity of the silicon-copper alloy catalyst

Method used

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  • Granulation apparatus, preparation method for preparing catalyst for silicon tetrachloride catalytic hydrogenation reaction, and silicon tetrachloride catalytic hydrogenation reaction method
  • Granulation apparatus, preparation method for preparing catalyst for silicon tetrachloride catalytic hydrogenation reaction, and silicon tetrachloride catalytic hydrogenation reaction method
  • Granulation apparatus, preparation method for preparing catalyst for silicon tetrachloride catalytic hydrogenation reaction, and silicon tetrachloride catalytic hydrogenation reaction method

Examples

Experimental program
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Effect test

Embodiment 1

[0053] Such as figure 1 , 2 As shown, a granulation device in this embodiment includes a melting tank, a casting pan 1, a cooling box 2, and an oscillating mechanism 3. The oscillating mechanism 3 is arranged on the casting pan 1, and the raw material Melted into a molten liquid and poured into the pouring pan 1, the oscillation mechanism 3 is used to make the pouring pan 1 vibrate, and then the molten liquid in the pouring pan 1 is dropped into the cooling box 2 Particles were obtained in the coolant 5.

[0054] Preferably, the oscillating mechanism 3 is an intermediate frequency oscillator, and the frequency of the intermediate frequency oscillator is 50-200 Hz.

[0055] Such as image 3 , 4 As shown, preferably, the casting tray 1 is provided with a liquid outlet 4 with a diameter of D, and the height from the liquid outlet 4 to the cooling liquid 5 in the cooling box 2 is H, wherein, H / D is 7-70.

[0056] Such as image 3 , 4 As shown, preferably, the casting tray...

Embodiment 2

[0071] This embodiment provides a method for preparing a copper-silicon alloy catalyst containing Cu-Si metal bonds for the catalytic hydrogenation of silicon tetrachloride using the granulation device in Example 1, comprising the following steps:

[0072] (1) The raw material is melted into a molten liquid through a melting tank and poured into a casting pan, and then the casting pan is vibrated by an oscillating mechanism so that the molten liquid in the casting pan drops into the cooling liquid in the cooling box to obtain Granular alloy, wherein the molten liquid includes: Si: 15wt%, the rest is copper;

[0073] (2) Vacuum annealing the granular alloy at 760° C. for 18 hours to obtain a copper-silicon alloy catalyst containing Cu-Si metal bonds for catalytic hydrogenation of silicon tetrachloride.

[0074] By using the granulation device in Example 1 to prepare the catalyst obtained by the preparation method of the catalyst for the catalytic hydrogenation of silicon tetrac...

Embodiment 3

[0079] This embodiment provides a method for preparing a copper-silicon alloy catalyst containing Cu-Si metal bonds for the catalytic hydrogenation of silicon tetrachloride using the granulation device in Example 1, comprising the following steps:

[0080] (1) The raw material is melted into a molten liquid through a melting tank and poured into a casting pan, and then the casting pan is vibrated by an oscillating mechanism so that the molten liquid in the casting pan drops into the cooling liquid in the cooling box to obtain Granular alloy, wherein the molten liquid includes: Si: 15.5wt%, the rest is copper;

[0081] (2) Vacuum annealing the granular alloy at 700° C. for 24 hours to obtain a copper-silicon alloy catalyst containing Cu-Si metal bonds for catalytic hydrogenation of silicon tetrachloride.

[0082] This embodiment also provides a method for catalytic hydrogenation of silicon tetrachloride, comprising the following steps:

[0083] (1) Pass hydrogen into the fluid...

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Abstract

The invention discloses a granulation apparatus, a preparation method for preparing a catalyst for a silicon tetrachloride catalytic hydrogenation reaction, and a silicon tetrachloride catalytic hydrogenation reaction method. The granulation apparatus comprises a melting tank, a casting disc, a cooling box and an oscillation mechanism, the oscillation mechanism is arranged on the casting disc, the melting tank melts a raw material to form a molten liquid and pours the molten liquid into the casting disc, and the oscillation mechanism is used for oscillating the casting disc and allowing the molten liquid in the casting disc to drop to a liquid coolant in the cooling box. The granulation device allows the molten liquid in the casting disc to fall to the liquid coolant in the cooling box as uniform particles through oscillation of the oscillation mechanism arranged on the casting disc, and is used to granulate into particles, so the size is uniform, and the specific surface area is greatly increased. The catalyst prepared through the preparation method avoids the microscopic bonding effect of catalysts, and can maintain active sites in a catalytic state for a long term, so the catalysis life of the catalyst is greatly prolonged.

Description

technical field [0001] The invention belongs to the technical field of producing trichlorosilane from silicon tetrachloride, and specifically relates to a granulation device, a method for preparing a catalyst for catalytic hydrogenation of silicon tetrachloride and a method for catalytic hydrogenation of silicon tetrachloride. Background technique [0002] Polysilicon is the basic material of the solar photovoltaic industry. 75-80% of polysilicon in the world is produced by the improved Siemens method. There will be about 16 tons of by-product silicon tetrachloride generated. [0003] At present, the cold hydrogenation process of silicon tetrachloride (STC) used by domestic polysilicon manufacturers is carried out in a fluidized bed reactor, because the reaction conditions of monovalent copper and silicon and / or hydrogen are milder than divalent copper, and the reaction temperature is lower , so a monovalent CuCl was chosen as the catalyst. Absolutely dry CuCl is a white p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J2/06B01J2/18B01J23/72B01J35/02C01B33/107B01J35/00
Inventor 郭增昌刘兴平吕学谦刘乐通
Owner 新疆硅基新材料创新中心有限公司